disk space expansion

[Joep L. Blom]

I have a little problem and actually a little ashamed to ask as I can't 
remember how to solve it.
The situation:
I have in my main workstation a sata disk of 1 Tb where approx. 450 GiB 
is unallocated. The division is:
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      194559       96256   83  Linux
/dev/sda2          196606   996286463   498044929    5  Extended
/dev/sda5          196608   195506175    97654784   83  Linux
/dev/sda6       195508224   781443071   292967424   83  Linux
/dev/sda7       781445120   976754687    97654784   83  Linux
/dev/sda8       976756736   996286463     9764864   82  Linux swap
The problem:
I have only 1 primary partition of 100Mb (/dev/sda1) where /boot is 
mounted. Now as currently 100 MB for a boot sector is rather small I 
need to expand it. As you can see ,however, there is no room for 
continuous expansion as /dev/sda2 starts already 2048 sectors further.
There must be a way to do it but I don't know. I hope somebody here can 
help me out.
Thanks in advance,
Joep