I had a good and bad experience with my rom swap. I bought 3 games Excitebike, TKO Boxing, and super Mario Bros. The excitebike swap was very simple, just be sure you don't break any pins on the chip. I swapped the roms and the PPU (the chip with the heat sink) and I was playing Excitebike.
TKO Boxing was missing the PPU chip and I tried using the Golf PPU, but it made the colors incorrect. I was able to use the PPU from Excitebike to get the game running with the correct colors.
As for Super Mario Bros. I bought a non-working set off ebay. All I would get is a blue screen. I figured it must be the rom set that I have so I purchased a set from Hobbyroms.com. He can't program the PPU, but I got the other chips from him. My order came yesterday and I swapped the old chips with the new ones,but I was still getting the a blue screen. I was hoping I didn't have a bad PPU, but after trying it in 2 different board with the game being as the 1st or 2nd game on the board it still didn't fix anything. I finally thought that maybe someone had glued the heatsink on backwards onto the chip, so I put the chip in with the name facing backwards. When I did that I didn't get the blue screen any more. I just got a black screen, even when I placed it facing forwards again. I guess I ruined the PPU for good.
Luckily Hobbyroms will let me send the chips he did for me back if they didn't work. I'm pretty sure an Ice Climbers PPU will work for Super Mario bros too. If I can find a set for cheap then I'll try that before I send the chips back.
Anyway, The rom swap was easy, it should take you 5 minutes to do it. Nothing too hard.
I hope this helps you in not making the same mistakes I did with putting the PPU in backwards.
I'm pretty sure any of those games will work in your cab.