you could try (if not already) the AHS - sorry a bit obvious) or ask paul simmons who posts on here. i think she was owned by bubba harper from near towcester, and emma owen (jenny's daughter i think) is still racing and may know her history. i remember the warwick race - good racing and good fun in those days.
I've replied to your e-mail but here's the data for those interested:
Snowbird ran once in 1999 when she was 5th in a maiden at Larkhill over 6 furlong behind French hot pot Seglaoui. In 2000 she ran at Wolverhampton in a maiden over 1 Mile 1 Furlong and was 6th of 9th, she was then last in a 6 furlong maiden at Huntingdon. In 2001 she ran twice - she was 2nd over 6 furlongs behind G Asdiqa at Brighton and 4th at Exeter behind Al Aasi over 6 furlongs. She was obviously quite speedy and would with her breeding produce a nice race foal.
Also her sire Galeon sired several very decent race performers notably Group 3 sprint winner Carrack (now successful endurance horse) and Caravel a champion stayer. Her dam Ice Maiden was placed 5 times from 8 starts in 1991. She is a half sister to Greg La Gringa who I believe was placed in UAE.
I haven't checked AHS records for 2001 as I believe you have these, She wass placed at Exeter and Brighton on ARO cards.