No. Several reasons:

1) The PharoCore 1.1 is not even so stable...imagine a dev
2) The PharoDev 1.0 are not even so stable...imagine a dev 1.1
3) Some external tools do not work in Core 1.1 and maintainers won't make them work until 1.0 is finished and 1.1 is almost finished/stable (I think).

However, if you want to do it by yourself and give it a shut, you can try loading the ConfgurationOfPharo and see what happens. The script you have it the image I prepared, but anyway, it is a simple as this:

Gofer new
��� squeaksource: 'MetacelloRepository';
��� package: 'ConfigurationOfPharo';
��� load.

((Smalltalk at: #ConfigurationOfPharo) project version: '1.0-rc2.10505.2') load.

Gofer new
��� squeaksource: 'ImageForDevelopers';
��� package: 'ImageForDevelopers-pharo';
��� load.


�