im not a huge advocate of a 5x5 program because i like variety both in exercise selection and in rep ranges and in forms of progression, however, if you are switching routines, try and use different sorts of exercises with that program and different set-rep schemes.
for example, the original layout is here:
http://www.geocities.com/elitemadcow...RE_DESCRIPTION:_
but you can tweak it into:
Monday:
Squats 5x5 Ramping weight to top set of 5 (which should equal the previous Friday's heavy triple)
Military Press 3-5x5 static weight
Pull-ups 3-5 sets to failure
Wednesday:
Deadlifts 3x3 Ramping weight to 1 top sets of 3*
Incline Dumbbell Bench Press 3-4 sets of 8-10 reps
Squats First 3 sets are the same as Monday, the 4th set is repeating the 3rd set again
Friday:
Squats 4x5, 1x3, 1x8 First 4 sets are the same as Monday's, the triple is 2.5% above your Monday top set of 5, use the weight from the 3rd set for a final set of 8
Flat Bench Press 3x5 same weight
Rows 5x5 same weight
--x---
this is just an idea off the top of my head....you can do quite a lot of changes..