File Quarantine Message Removal Query

Question

Dear Forum,
I am currently using TextWrangler in a non-admin 10.6.4 account to look into the files of a WP installation, however every time I try to open a new .php, the file quarantine message pops up, however as I have already installed the blog and run it (via MAMP), I am assuming that any nefarious code (if there is any) would have been executed already.
I have found this, but I am wary of using it as I, to put it simply, have no idea if this would do more damage than good, so I was rather hopeful that some clever forum members might take a look and comment (especially regarding: do shell script “xattr -d com.apple.quarantine”):
(The source is cited in the script below)
"Unquarantine" by Henrik Nyh <http://henrik.nyh.se/2007/10/lift-the-leopard-download-quarantine>
This Folder Action handler is triggered whenever items are added to the attached folder.
It gets rid of Leopard's annoying "this application was downloaded from the Internet" warnings by stripping the "quarantine" property.
on adding folder items to thisFolder after receiving addedItems
repeat with anItem in addedItems
set anItem's contents to (quoted form of POSIX path of (anItem as alias))
end repeat
set AppleScript's text item delimiters to " "
do shell script "xattr -d com.apple.quarantine " & (addedItems as text)
end adding folder items to
Cheers.

Answer 1

Looks fine AFAIK, but I'm not an AppleScript expert. The shell script part is fine.
Note that you should be careful with this. In Snow Leopard, quarantine protects you against several bits of malware. Although they're very rare and you should know better than to download any of them, you still don't want to remove that protection too quickly. Your purpose would be fine, but *DO NOT* apply such a folder action to a general downloads folder!
For more information, see:
http://www.reedcorner.net/thomas/guides/macvirus/#quarantine