Next download the following drivers and save them to a USB stick. These are unofficial and taken some other models as Dell does not support XP on this model. They should all work, post back what ones work and what ones fail.
Note it may not have a modem, if the first driver in 7. fails then ignore the rest in 7. Note bluetooth 365 was optional and so if this fails you don't have bluettoh. There are 3 wireless card variants, one driver should install and the other 2 should fail.
Dr Philip Yip Tech Enthusiast and Author of the Unofficial Dell Windows Reinstallation Guide