ernestz,
First you need to download MyEclipse-IDE-v7.5-ICEfaces-v1.8.2.zip from the following link http://www.icefaces.org/main/downloads/os-downloads.iface?category=Stable%20Releases,MyEclipse and then extract it to a folder.
You can update MyEclipse7.5 with ICEFACES 1.8.2 in two ways.
Option 1:
1) Open MyEclipse IDE.
2) Go to Help>Software Updates>Add/Remove Software…
3) Click Add.
4) Click Add Local and browse to refer folder extracted in step2.
5) Expand Personal Sites to locate “ICEfaces AJAX and Java EE Tooling for MyEclipse” and then select the corresponding check box.
6) Click Next
7) In next window select Apply.
8) In next window select Update.
9) After installation, Click Yes to apply changes
Option 2:
1) Drop extracted folder of MyEclipse-IDE-v7.5-ICEfaces-v1.8.2.zip file into MyEclipse Home directory/dropins(if not exist,crete it) folder.
2) Restart MyEclipse IDE.
3) MyEclipse will display a popup window with details regarding the plugin. Review and click on [OK]