Software for converting JPEG's to IBM Files

[thatguy96]

That's a great viewer, but unfortunately it doesn't look like it can convert back into .lbm. Its got a really nice thumbnail feature that allows one to look at all the stock .lbms at a glance which is nice though.

Quick question. Is there anything you need to do when saving an .lbm file that's special? Plasmakrab sent me a number of pictures in .lbm format, but had names, and when I assigned them arbitrary numbers and tried to view them in Mobhack they didn't show because the numbers I had chosen didn't align with the numbers that registered in the LBM ID field in Mobhack's viewer. How are these ID numbers set?