Custom Profile Field - Hidden to Admins

[Drakah]

I have read a few posts about the editing of the Custom Profile Field, namely the one about Magelo Linking.

Here is my concern:

I have a Custom Profile field that people enter in their URL for their Magelo Link, but I need it to be automatically converted into a URL after they submit it. The URL is always the same except the numbers.

Example: http://www.magelo.com/eq_view_profile.html?num=0000000
Where 0000000 would be their Character number.


Question 1:
How would I be able to make a Custom Profile Field that all they would have to do is enter the #'s instead of the whole URL and would be correctly linkable to open a new window?

Currently I have them typing in the whole field of the entire link, and I edited the MEMBERINFO, with an added IF statement to show this 'Field' as a Hyperhink. But it now shows the un-hyperlinked Field as well as the one I just added manually in the template. I now see both because I am an Admin, but Users only see the Hyperlinked one.

Question 2:
How would I edit to make certain profile fields NOT even show to Admins? Namely this field that they typed in their URL?

Thanks much!!