Office software for OS X/Classic - Lotus Approach DB

Lotus Approach is the current DB setup for my moms business. She is currently running XP on an older P4 and is getting frustrated by Windows and all the associated crap. I've given her my B&W running 10.4.9 for now to learn the basics of Mac OS on, but it can't replace the XP machine until I can get the DB working. It's fairly simple, an input page, an info card print out page and some searching for records updating. There are probably 1000-1500 records, depending on the time since the last old record clean out was. Anyway, does any one have any tips/suggestions/etc for getting the DB running on a Mac?