We'll quote fellow writer Jex H. on this one: "And so the SE-C mania continues." Over at our forums, mov just released xautob, an autoboot PRX for Dark_Alex's 2.71 SE-C. v0.2 fixes a small bug from the prior version that led to 2.71 applications being loaded under 1.50, mov explains.

Let the Readme explain this homebrew best:

This is a plugin for autostarting eboots under firmware 2.71se (tested only under se-C)

Features:

• cheesy fix allowing cpu speed changes (amongst other things?) for autostarted iR Shell 3.0 under 2.71 kernel (not sure if the problem affects apps besides iR Shell haven't checked - but the workaround is enabled for all 2.71 apps anyway).
  
• support for associating the following buttons with apps: triangle, circle, cross, square, left/right triggers, up, down, left, right, select, start, home, hold & the wlan switch state (on/off).
  
• config file support (psp/system/xautob.cfg); format: `button=ms0:/path/to/eboot'. includes basic comment support (lines prefixed with #), kernel specification, pretty loose button/kernel reading (ltrigger is the same as LtRiGgEr is the same as ltrig, 150 cross = cross_150, etc.). blank or invalid path entries in the config are interpreted as "load the XMB"; if multiple entries for the same button are found the last one is used.
  

example config:

# wlan switch on? start irshell under kernel 2.71..

wlanon=ms0:/psp/game271/irshell271/eboot.pbp

# wlan switch off? start irshell under kernel 1.5..

wlanoff_150=ms0:/psp/game150/irshell150/eboot.pbp

# load xmb

ltrig=