Ran out of memory I can't run Attack of the B-Team

[Dunoonian]

Right well, I am having problems running attack of the B-team. (My PC specs are below) 

when I click "Create new world" it generates like any normal minecraft world but when it is supposed to load in it says "Minecraft ran out of memory" now I don't have much RAM anyway but when I try to allocate more RAM to technic altogether it only allows a max of 1GB. so I ask, how do I give my modpacks more memory?

 

My Specs:

Operating System: Windows 8 64-bit

CPU: Intel Pentium G2020 @ 2.90GHz 30 °C

         Ivy Bridge 22nm Technology

RAM: 4.00GB Single-Channel DDR3 @ 665MHz (9-9-9-24)

Motherboard: Packard Bell imedia S2870 (SOCKET 0) 28 °C

Graphics: DELL E228WFP (1680x1050@59Hz)

                Intel HD Graphics (Acer Incorporated [ALI])

Storage: 465GB Seagate ST500DM002-1BD142 (SATA) 42 °C

Optical Drives: HL-DT-ST DVDRAM GH82N

Audio: Realtek High Definition Audio

 

(I know that most of that is extra information but I copied it over from speccy)

[Kr0nZ]

when I try to allocate more RAM to technic altogether it only allows a max of 1GB. so I ask, how do I give my modpacks more memory?

 

Install 64 bit Java.

 

I only have 4 GB on my laptop so you should be able to run it fine with that, just after installing the 64 bit Java set the launcher to use 2 GB.