I'm afraid that isn't allowed either - any testing by an F1 team regardless of what car they're running is strictly controlled.
"22.1 a) Track testing shall be considered any track running time undertaken by a competitor entered in the Championship with the exception of:
i) promotional or demonstration events carried out using tyres provided specifically for this purpose by the appointed supplier;
ii) three one day young driver training tests carried out between the end of the last Event of the Championship and 31 December of the same year, any such driver having not competed in more than two F1 World Championship Events;
iii) eight one day aerodynamic tests carried out on FIA approved straight line or constant radius sites between 1 January 2009 and the end of the last Event of the Championship.
b) No competitor may carry out more than 15,000km of track testing during a calendar year.
c) No track testing may take place between the start of the week preceding the first Event of the Championship and 31 December of the same year."
http://argent.fia.com/web/fia-publi...ULATIONS (Showing Alterations) 24-03-2009.pdf