[RESOLVED] Adding space every two digits or letters

[2005]

Can someone show me how can i add a space after every two digits, letters or both in a RichTextBox???

In other words, instead of this:
00000000000000000000
00000000000000000000

Should be this:
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00

Thanks...