Starting a executable from multiple threads through Process.Start()

Question

I am using "7z.exe" to do some extra work in my application(c#).I have embedded "7z.exe" in the main executable of my application as a resource file. During execution of my application i extract "7z.exe" on a hard-disk and execute it through Process.Start().

I need to execute "7z.exe" multiple times and from multiple threads. Is it safe to access same "7z.exe" file from multiple threads? or should i extract separate "7z.exe" (to different location on hard-disk) for each process.Start()

PS:7z.exe belongs to Seven-zip software which is written in c/c++.