Hello, and welcome to RRU!
Firstly, the WAD files can be opened with Wad Recycler, which is a great easy-to-use tool. You'll likely be wanting to look at Lego.cfg in LegoRR1.wad.
Secondly, the Sonic Blaster crash is mostly unknown after all these years. There's been progress with these and these but even after using both of these it's possible you'll still have a crash. Most players opt to just never use them.
Thirdly, the crystal glitch is reasonably well known. It happens when your raiders fire a Laser Beam, right?
and there are a couple of ways to fix it:
- mod it yourself following the above instructions
- install my Improvements Pack (requires Cafeteria, but there's an older .WAD version down the bottom which contains that fix too)
- install Community Edition (also requires Cafeteria)