I have a Compaq V5201US that is Booting Knoppix ver 5.1.1 from a 2Gig SanDisk USB PenDrive and is working fine...so far.

Compaq V5201 Specs are:
Product Name Compaq Presario Laptop - V5201US
US Product Number EZ552UA#ABA
Microprocessor 2.0GHz Mobile AMD Sempronâ„¢ Processor 3300+
Microprocessor Cache 128KB L2 Cache
Memory 512MB 333MHz DDR System Memory (2 Dimm) (I upgraded to 1 Gig DDR)
Memory Max 2048MB
Video Graphics ATI RADEON XPRESS 200M IGP
Video Memory 128MB DDR (shared)
Hard Drive 80GB 4200RPM (I upgraded to a 120 Gig Fujitsu)
Multimedia Drive Super Multi 8X DVD±R/RW with Double Layer Support
Display 15.4� WXGA High-Definition BrightView Widescreen (1280 x 800) Display
Fax/Modem High speed 56k modem
Network Card Integrated 10/100BASE-T Ethernet LAN (RJ-45 connector)
Wireless Connectivity 54gâ„¢ 802.11b/g WLAN with 125HSM / SpeedBooster support
Sound Altec Lansing
Keyboard 101-key compatible
Pointing Device Touch Pad with dedicated vertical and horizontal Scroll Up/Down pad
PC Card Slots 1 ExpressCard/54 Slot (also supports ExpressCard/34)

External Ports 2 Universal Serial Bus (USB) 2.0
1 headphone-out
1 microphone-in
1 VGA (15-pin)
1 TV-Out (S-video)
1 RJ-11 (modem)
1 RJ -45 (LAN)
1 notebook expansion port 2
1 Consumer IR

Dimensions 10.2"(L) x 14.1"(W) x 1.38"(min H) /1.77"(max H)
Weight 6.4 lbs
Security Kensington® MicroSaver lock slot
Power-on password
Accepts 3rd party security lock devices

Power 65W AC adapter
6-Cell Lithium-Ion

Larry