Change image filename that only contains numbers to a unique name

[PAEz]

This filter will change the name of an image file that only has numbers in its name into a unique name.
This way if your downloading from multiple galleries to the same directory that all name their files like 10.jpg, 06.jpg it will be changed to something that wont be the same of whats already there.
The url in the url bar wont change but if you Save Image the name will be different.

[HTTP headers]
In = TRUE
Out = FALSE
Key = "Content-Disposition: Change images that have numbers only for filename to a unique name for saving (in)"
URL = "*/[0-9]+.(jpg|jpeg|png|gif)"
Replace = "inline; filename="$DTM(YMDHmst)";"

...Now for the truth :P ...this seems to work for me with my very limited testing but I cant do regex stuff and kinda guessed that match expression...so if any one could validate it for me or show me a better way of doing this it would be much appreciated.