[Xastir] Which version of Linux for older computers?

[Josh Keller]

I've been slowly working on a radio logging app (sort of an app, it's 
PHP/MySQL based) that interfaces with Xastir for my SAR group and one of 
the other local ARES groups has taken interest in it also. They have 
some older donated laptops that we are trying to get setup with Linux, 
Xastir, and my radio logging system. The laptops they are using are 
Pentium 133, 233, and 333 systems. I *think* they have 64MB RAM in them.

I personally have run RedHat for many years but only have discs left 
over from RH9-FedoraCore 3. RH9 runs extremly slow (granted, everything 
will be extremly slow on these machines from my point of view, but this 
is coming from the people that have been using them with Win98 for a 
couple years). Which version/flavor would be suggested for these machines.

Thanks,
Josh

P.S.
The purpose of this question is not to start a battle over which flavor 
is better I don't want any of those kinds of responses. I just need to 
know how far back to go for a good OS on these older machines.