"Q"
http://www.kju-app.org/
does work too if you already have a copy of windows xp ,and if you know how to work in the terminal , but i found it a bit sluggish to say the least but its sort of usable
best you can go for is still virtual pc for Mac which comes with windows xp included , ok it cost money , usually here in the uk up to £60 + , but i think as its still the best option to get windows on a ppc Mac and a fully working one straight outs box without the need of terminal work
well worth the money , ok you wont be able to play games on i guess ..but you could always try
just for example i did try both Q emulated the equivalent of a 60mhz processor on my 1.42mhz eMac with 2 gb ram , ok i could choose to have up to 1gb ram in Q
virtual pc emulates a equivalent of a 600mhz processor in the same eMac , but limited in virtual pc to 512 mb ram , still its enough for most programs to work with ,i used it for my microsoft office for windows until i got microsoft office for Mac , ok games could be a challenge