Ahman has updated his iR Shell to version 1.2 today. iR Shell is the first “multitasking” shell program for the PSP, as well as one of the most reliable screenshot apps. Also, this program can be used as a universal infrared remote controller. Here are the details about this release:

Version 1.2
AdHoc WiFi File Transfer Added:

• To use AdHoc WiFi file transfer, go to directory view and highlight the file or directory you'll want to send. Then, press Left Trigger + Cross and follow the on-screen instructions.
• You can choose a single file or a single directory to transfer. Please pay attention when you choose a single directory as it'll send over all files & subdirectories under it.
• The file transfer protocol currently has no error recovery. If one of the PSP loses sync, you'll need to hit Square button to abort the transfer and restart the whole thing again.
• The file transfer throughput isn't that great at the moment and is around 90KB/sec when the receiving side has a Sandisk MS. It will drop down to 3XKB/sec when the receiving PSP has a Sony MS. This is just another way to prove the slow write access on Sony MS.
• The PSP WiFi system modules are loaded into user space. As a result, you may encounter some compatibility issues when playing certain UMD games while doing file transfer simultaneously.
• File transfer progress & estimated time display.