The first time in my life I’ve got to remove ubunutu from a nice pc survived to 4 distr-upgrade successfully. A sad day!
Anyway, my friend asked me to do it and the “great mistake” was there… I removed the partition forgetting the boot manager… and now windows says “ups!” GRUB Error 17.
Obviously I don’t have here a Win XP install disk, only the original recovery disk of HP that does not permit me to rebuild the mbr.
I decided to write here how to solved it using the UBUNTU LIVE way (hope!)

1) When ubuntu is started, go to:

System -> Administration -> Software sources</pre>and enable the "universal" repositories.<br /><br />2) Open a terminal and install necessary additional software (<a target="_blank" href="http://ms-sys.sourceforge.net/">ms-sys</a>)<br /><pre>sudo apt-get install ms-sys<br /></pre>3) Now you’ll need to figure out what partition is the one hosting your Windows operating system.  Back in the command line, type:<p><pre>sudo fdisk -l</pre></p><p></p> <p>That will list the available partitions.  You’re looking for a partition that says something like</p><p><pre>/dev/sda1 * 1	ecc ecc</pre>You have to recognize your windows partition in order to advance...</p><p>4) rewrite boot!</p><p><pre>sudo -s ms-sys -m /dev/sda1 (o altro disco se diverso da questo)<br />

It’s not nice to say, but it didn’t work on my laptop.

Thanks a lot to ubuntulandia for his original tutorial.

I was curious to try an IDE on Osx for Rails development and APTANA STUDIO seems to be the right product. (I do use TextMate as editor)

Aptana Studio is fully installed on my laptop but, when I try to install the RedRails plugin, it returns this error:

Requested operation cannot be performed because it would invalidate the current configuration. See details for more information.

Ruby Mylyn Connector Feature (Optional) (0.9.3.6479) requires feature
"org.eclipse.mylyn.context_feature (2.0.0.v20070628-1000)", or later version.

The solution: http://support.aptana.com/issues/browse/ROR-156

The most important steps are:

1. Went to Help=>Updates=>Find and Install. Installed three Eclipse updates that the system found. Installation of updates worked ok.
2. When the update window appears with RadRails updates, expand the tree and uncheck the box next to the Ruby Mylyn Connector Feature. This is an optional extension for users of Mylyn. You don’t need it, so you can safely uncheck the box and install.

This seems to works either on Windows, Osx and Linux