Hi,
you just need LHa for amiga just look on aminet you'll find it !
You can extract files on a PC under windows but there is a problem with files under subdirectories as amiga uses slash "/" and pc uses backlash "\".
If you want to extract files on amiga just one advice: have a second floppy drive or an hard disk, if not you can use ramdisk if you have enough ram.
http://www.aminet.net/
