Thanks to the good work from developer team ASTeam the ASTools software has been updated to version 2.2.  This software has many functions in a nice package which makes it easy to use.  You have ability to edit PARAM.SFO files as well as convert ELF to EBOOT.BINS and the reverse.

The ASTeam lists the features as follows:

"What is features?

Convert ELF to EBOOT.BIN

convert EBOOT.BIN to ELF

Editing PARAM.SFO

PKG and the 3.41 and 3.55, and fixed manufacturing EBOOT.BIN

PKG file extraction

PKG files to the HDD and Disc Patch PSN

Internal and external hard drive formatted to FAT32 (for PS3)

Useful links about games and PS3

Convert all files to play a pkg (WSW procedure and PSN, and GDS)

Internal software for ps3

Construction of fixed EBOOT

Edit SFO

Burn Games in DVD or CD For play directly from PS3

Rip 3D Files Simple

Add 2DIRGame For Convert Gam"

Source:  [Released] ASTOOLS V2.2 | PS3Hax Network