i'd include the TM sign here...I was going to PM but then thought, well, it may be of use to someone else who hasn't read about this issue before, so here goes.
To insert a special character, use the numeric keypad like so:
Hold down the <Alt> key
Press the <Insert> key underneath the <1> on the right hand side of keyboard
Then press the 3-digit code for the character you want
Then release the <Alt> key
So for ™ you would go ALT + sequence of Ins, 1,5,3 then release ALT
Other codes include:
188 = ¼
189 = ½
190 = ¾
169 = ©
174 = ®
232 = è
233 = é
234 = ê
223 = ß (useful for swearing in German!)
254 = þ (useful for swearing in Old English!)
Hope this helps.
If you want a full list of all the weird’n’wonderful characters available, go here:
http://htmlhelp.com/reference/charset/iso)64-095.gif(and its associated pages)
If this is all sounding immensely complicated, told I am the Apple system is nearly twice as easy
which, since their latest 'fast' processors are over twice as slow as our current PCs', is probably just as well! 
