Motherboard Replacement 32-bit to 64-bit

hey i have a Macbook 3,1 , which is 32-bit. I want to know if i can get a motherboard replacement from 32-bit to 64-bit. Here is the hardware stats:

Model Name: MacBook

Model Identifier: MacBook3,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.2 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache: 4 MB

Memory: 5 GB

Bus Speed: 800 MHz

Boot ROM Version: MB31.008E.B02

SMC Version (system): 1.24f3

Serial Number (system): W874713DZ64

Hardware UUID: 6060D096-A945-5BBA-BC8B-E303358D58DA

Sudden Motion Sensor:

State: Enabled

please help I can almost do nothing with the new programs with such an old computer