Cheap Build Suggestions

I was given an old Dell. My mom wants a new computer for e-mail and online shopping, but doesn't want to spend much. I was thinking of using that Dell, and upgrading its insides to keep the cost down. My budget is $150.

What I Plan To Reuse:
CD-ROM drive
Floppy Drive
PSU
Sound Card
Keyboard/mouse
Hard Drive
Linux Ubuntu

What I Want:
Case
Motherboard
Processor
Memory (1gb)
Wireless LAN card

Thanks

I found these. Tell me if you think these might fit in my build.
http://www.newegg.com/Product/Produc...82E16811164089
http://www.newegg.com/Product/Produc...82E16813138100
http://www.newegg.com/Product/Produc...82E16820146568
http://www.newegg.com/Product/Produc...82E16833320022

Those are a motherboard, CPU, memory, case, wireless adapter and even PSU, since I know dell one's aren't good.

Foxconn 945G7MC-KS2HV LGA 775 Intel 945G Micro ATX Intel Motherboard - Retail

http://www.newegg.com/product/produc...82E16813186112



Intel Pentium E2140 Allendale 1.6GHz LGA 775 65W Dual-Core Processor Model

http://www.newegg.com/product/produc...82E16819116037



Patriot Signature 1GB (2 x 512MB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Dual Channel Kit Desktop Memory Model PSD21G667K - Retail

http://www.newegg.com/product/produc...82E16820220066



ENCORE ENUWI-G2 USB 2.0 Wireless Adapter - Retail

http://www.newegg.com/product/produc...82E16833180017

No idea about the performance of the wireless adaptor, just choose the cheap one

I have to admit, no matter how I hate ENCORE, that adapter was terrific. Unfortunately, after using it for 3 minutes, it's probably hotter than your CPU...

really? i haven't come across them be4.... but looking at his budget....