modify and move dates included in filenames

Advanced Renamer forum
#1 : 11/12-09 12:36
Posts: 1
hi! i have a huge number of files in the following format:
<var text> <(d)>
with (d)d indicating that this part is one digit for dates 1-9 and 2-digit for dates 10-31.
i need to change the filenames to the following format:
<yyyymmdd> <var text>
with dd indicating that originally one digit day dates must be converted to two digits, e.g. 200091208.
i have no clue on how to go on about this...could somebody help me? can i do this with AdvancedRenamer? or can somebody recommend another tool for this task?
thanx in advance

11/12-09 12:36