OFS upgrade query

Hi Team,

We are planning to upgrade Oracle 10g to 11g. Below is my query,

1.We are upgrading oracle 10 g to 11g on WIndows 2003/2008.

2.In prod systems first we need to upgrade OFS to 3.4.2 and then to perform oracle upgrade on all the other nodes.

3.If we upgrade OFS on the old home directory i .e in our case is /oracle/SID/10ghome direcotry. if we install OFS to this directory and later on we uninstall oracle 10g from the systems will the OFS work???

Or is it best to install OFS to other directory.

Did any one faced this issue if so Kindly share your inputs on this.

Thanks & Best Regards,

Sijil Subramanian