[Krelian]

This guide assumes you are using Open Edition firmware 3.02OE-A or higher.
If you are currently using Sony firmware 3.10 or higher this guide does not apply to you, please see the PSP 3.10+ Firmware Problems thread for more information.

This guide uses the following software:
IsoBuster (FREE)
PSX2PSP v.1.2 - PopStation GUI

Before we can begin you must install IsoBuster and PSX2PSP.
The first time you launch IsoBuster it will prompt you to register. I recommend using the "Free funct. only" since it provides the reliable ISO ripping you need (however because it is a very good utility if you decide to purchase and register a copy more power to you).
The first time you launch PSX2PSP it will prompt you to select a mode. I recommend using Theme Mode as it allows you to preview the results of your custom EBOOT menu.

To begin converting PSone games to PSP you must first extract the ISO to your PC.
Insert the CD of your PSX game into your PC. In IsoBuster you will see the the session(s), track(s) and file-systems of your disc.
Right-click the CD listing at the top of the tree on the left and choose Extract CD < Image > RAW (*.bin, *.iso). It will ask where to save the BIN and after the extraction where to save the CUE.
For the BIN file to work with PSX2PSP you must add .iso to the end of the generic BIN file that IsoBuster created.
In Theme Mode of PSX2PSP open the Convert Menu. Under ISO/PBP File navigate to where you saved your ISO. PSX2PSP should automatically fill in the Game and Save titles and IDs.
(NOTE: If you are converting a multi-disc game make sure you use the same Save ID on each discs EBOOT.)
Under Output PBP folder navigate to where you want your EBOOT.PBP to be saved after conversion.
From here if you do not wish to customize the EBOOT.PBP menu you can click the Convert button and your playable EBOOT will be created.
If you do wish to customize your menu open the Customize PBP Menu.
Here you can choose which graphics are used for the icon and menu, more specific information will be added for this later.
After you have chosen the graphics you wish to use for your converted PSone game close the Customize PBP Menu and hit the Convert button on the Convert Menu.
Now copy your completed game folder to your PSP memory stick under X:\PSP\Game\
You are now able to play your favorite PSone game on your PSP!

NOTES:
Not every game plays with 100% accuracy, tweaks and PopStation improvements are always forthcoming.
This tutorial is a rough draft and will be improved upon at a later time, likely with pictures and a troubleshooting list.

REFERENCES:
PSX to PSP guide? Help?
First Post be gentle - ISO and OE3.4 Questions
3.4OE-A - Install Complete, Still Have Questions

RESOURCES:
PopStation ImagePacks - A database of graphics for customizing your EBOOT.PBP menu.
PSXPSP Manuals - A forum containing several DOCUMENT.DATs that can be placed in the same \PSP\Game\ directory as your EBOOT to view the Software Manual while in game.

[Darkchild]

I hereby pronounce this post a Sticky =D

[roe-ur-boat]

Yeah very nice guide. +rep for you

[chemist]

Thanks this guide led me to make my very first working psxpsp eboot!

[Krelian]

I need to set some time aside to add pictures and a few more details but I'm glad it was able to help you!

[Pantysniffer]

Nice one Krelian. Now if only I could find my old copy of Final Fantasy VIII...
By the way, IsoBuster is a great app., but MagicIso has worked well for me in the past too.

[Chilly Willy]

I use CDRDAO in linux to dump the discs.

[nimrod74741]

can you only have 1 ps1 game at a time?

that's pretty annoying

[Cheezeball99]

Not at all, Nimrod, you have to set the EBOOT.PBP and the DOCUMENT.DAT into it's own folder, like for instance GAME/Final Fantasy IX would contain the Eboot and the DAT for FF9. I, right now, have 7 on my memstick, I believe. (Document.dat isn't necessary, but I use it.)

[MCP]

I've just searched manually and found the latest version of popstation was given out in 3.03 OE-c correct?

I created an EBOOT using 3.03 OE and then since it doesn't work completely I wanted to try the OE-c version of popstation. However the memory card does not show any saves when I copied the saved data over from the older EBOOT folder to the OE-c version. Is there a way to use the saves from the older version in the newer version?

Running 3.40-EOa