Today AerialX has released a new version of PSGroove that allows you to use the apploader function.
Apploader (the 1st folder above install packages) allows you to run PS3 pkg's without installing them, it can also run eboot.bin's with some modification.
Download: PSGroove with Apploader Payload / PSGroove with Apploader Payload and Peek/Poke Syscalls / PSGroove with Apploader Payload Guide / Precompiled Hex Codes
To quote: My PSGroove fork is up! Functions are relocatable and it includes the USB stick apploader payload.
This fork comes with multiple payloads, which you can enable by editing port1_config_descriptor.S. All payloads have been rearranged so that they do not use hardcoded addresses anymore; you can rewrite and resize functions without worrying about offsetting others.
### Default Payload
The default payload performs the basic PSGroove exploit; it allows you to install and run unsigned packages.
### Apploader Payload
This payload makes use of the /app_home/PS3_GAME menu item. You may place an application on a USB drive under the PS3_GAME folder to run it without installing a package.
Note that simply extracting a .pkg onto the USB drive is not quite enough for a program to run. EBOOT.BIN must be slightly modified to boot properly.
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