Esteemed developer Zx-81 has issued a minor compatibility update to Portable VNC for PSP, addressing an issue that prevented IR keyboard units from functioning properly on custom firmware 3.80 M33 and above.
For those unfamiliar with the homebrew application, Portable VNC allows users to remotely access their PC desktop on the PSP via standard WiFi connection.
Download Portable VNC v1.2.8 for Custom Firmware / Portable VNC v1.2.8 for Firmware 1.5
PSPVNC: Portable VNC v1.2.8 [Zx-81]